micky8

My ES 300 overdrive does not shift when at operating temperature. The overdrive shifts as the car is warming up, but after it gets to normal temperature, it does not shift. I don't know if this is related, but the CEL has been on for some time. The error code indicated a failed O2 sensor. Replaced that and within 200 miles it came on again. Any insight as to what the problem could be?

IDRIVE ES

i dont know what to tell you the same exact thing happened to me, ive just always replaced the O2 sensor so any other help would be great

micky8

Well - I was trying to avoid a trip to the dealer, but I guess I'm about down to that. IDRIVE ES, I'll let you know the answer.